Wonderful【BPA FREE】BK vacuum roll bags can be heated, frozen, reused, washed, boiled and dishwasher safe. It allows you to precisely control the cooking temperature for perfect results. You can cook sous vide in BK bags by placing them in water at any temperature up to 230°F/110°C【Vacuum sealer】BK food saver bags have specially designed channels for remove oxygen, maintaining food moisture and creating an airtight barrier that blocks flavor and prevents spoilage and freezer burn【Personalized Food Saving Bags】The BK vacuum roll is compatible with all major brand vacuum sealers, in seconds you can make a customized size vacuum bag. 【EASY TO CUT AND SEAL】Recessed groove design on one side, other side polished transparent design.